200519-N-BC190-1015 PACIFIC OCEAN (May 19, 2020) Sailors signal the fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) as it goes alongside the aircraft carrier USS Nimitz (CVN 68). The Nimitz Carrier Strike Group (CSG) is underway conducting a composite training unit exercise (COMPTUEX). COMPTUEX is an intensive exercise designed to fully integrate units of the CSG, while testing a strike group's ability as a whole to carry out sustained combat operations from the sea. (U.S. Navy photo by Mass Communication Specialist 3rd Class Sarah Christoph/Released)